COMPOSITE PREPREG CONSTRUCTIONS AND METHODS FOR MAKING THE SAME

    公开(公告)号:US20250018660A1

    公开(公告)日:2025-01-16

    申请号:US18702327

    申请日:2022-09-29

    Abstract: Through-thickness permeable prepregs comprise a fiber bed and a plurality of discrete resin regions on a surface of the fiber bed separated by exposed fiber bed surface regions. Prepreg assemblies for processing such prepregs comprise an air permeable resin barrier material disposed over a surface of the prepreg opposite a forming tool. The air permeable resin barrier material is permeable to air or gas passing from the prepreg and is impermeable to resin passing from the prepreg. During processing, the prepreg assembly is subjected to a vacuum and elevated temperature to cure the resin and form a composite part. During processing, the air permeable resin barrier material prevents unwanted resin bleed from the prepreg, causing resin pressure in the prepreg to be maintained that reduces or eliminates unwanted formation or growth of internal voids to provide a composite part having a reduced degree of internal voids and pores.

    Two-part bag seal
    2.
    发明授权

    公开(公告)号:US12115741B2

    公开(公告)日:2024-10-15

    申请号:US17663713

    申请日:2022-05-17

    Inventor: Charles Tur

    CPC classification number: B29C70/544 B29C70/44

    Abstract: A two-part bag seal and a method for sealing a vacuum bag to a mold for a molding process. The two-part bag seal includes an elongate first seal part having a cross-sectional portion enclosing an open channel therein, and an angled cross-sectional portion having an open receptacle channel therein, and an elongate second seal part having a flexible wing portion and a flexible prong distal from the flexible wing portion, wherein the flexible prong is engageable with the open receptacle channel of the elongate first seal part.

    Elastic abrasive manufacturing method, elastic abrasive manufacturing device, blasting method, and blasting device

    公开(公告)号:US12059851B2

    公开(公告)日:2024-08-13

    申请号:US18108263

    申请日:2023-02-10

    CPC classification number: B29C70/00 B24C9/006 B24C5/02 B24C7/0046

    Abstract: A re-circulatory blasting device obtained is capable of performing stable treatment for a prolonged period of time even in cases in which an elastic abrasive employed has abrasive grains adhered to the surface of elastic cores. An elastic abrasive regeneration device provided to the blasting device regenerates elastic abrasive employed for re-circulation. The elastic abrasive regeneration device includes a mixer and a combining unit. Recovered abrasive fed in from an abrasive recovery section is mixed in the mixer with abrasive grains fed in from an abrasive grain feeder, and the abrasive grains are adhered to the surface of the cores of the recovered abrasive. In the combining unit, the abrasive grains are pressed against and combined to the surface of the cores by passing an aggregated state of the recovered abrasive mixed by the mixer along a constricted flow path having a flow path cross-sectional area that gradually narrows.

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